/Engine/Source/Developer/HierarchicalLODUtilities/Public/IHierarchicalLODUtilities.h
enum EClusterGenerationError { None = 0, ValidActor = 1 << 1, InvalidActor = 1 << 2, ActorHiddenInGame = 1 << 3, ExcludedActor = 1 << 4, LODActor = 1 << 5, ActorTooSmall = 1 << 6, AlreadyClustered = 1 << 7, ComponentHiddenInGame = 1 << 8, MoveableComponent = 1 << 9, ExcludedComponent = 1 << 10, }